WEEKLY BRAINTEASER
Move one matchstick to get 4 identical triangles.
RESEARCH SOURCES
Fact Monster: http://www.factmonster.com/
Guiness Book of World Records: http://www.guinnessworldrecords.com/
FUN THINGS TO DO
Highlights Kids: http://www.highlightskids.com
Online Rush Hour: http://www.puzzles.com/products/RushHour/RHfromMarkRiedel/Jam.html (requires Internet Explorer)
What's Gnu: http://www.thinkfun.com/flash/whatsgnu/index.html?abcd=1234